Work-rest for grinding-machines.



H. T. SHEARER.

WORK REST FOR GRINDING MACHINES.

APPLICATION FILED APR-5.1912.

Patented Dec. 7, 1915.

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HARRY '1. SHEARER, 01E WAYNESBORO, PENNSYLVANIA, ASSIGNOR TO THE LANDISTOOL COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION OF PENNSYL-VANIA.

WORK-REST FOR GRINDING- MACHINES.

Specificationof Letters Patent.

Application filed April 5, 1912. Serial No. 688,652.

To all whom it may concern:

Be it known that I, HARRY T. SHEARER, a

citizen of the United States, residing at Waynesboro, Franklin county,and-State of Pennsylvania, have invented and discovered certain new anduseful Improvements in Work-Rests for Grinding- Machines, of which thefollowing is a specification.

My said invention consists in certain improvements in the details ofconstruction and arrangement of parts of work rests for use on grindingmachines, whereby such a rest is provided which will support the workfirmly against the action of the grinding wheel, and one which can beaccurately and quickly adjusted, all as will be hereinafter more fullydescribed and claimed.

Referring to'the accompanying drawings which are made a part hereof, andon which similar reference characters indicate similar parts, Figure 1is a side elevation of a work rest embodying my said invention, and Fig.2 a detail sectional view on the'dotted line-22 in Fig. 1.

In said drawings the portions, marked A represent the work table of themachine, B the base or frame of the rest, and C the grinding wheel,which parts are, or may be, of any approved construction. The base B ismounted upon the work table A by means of clampin bolts 6 in the usualmanner. Said base carries two work supporting blocks 10 and 11 mountedto bear upon the underside of the work and the side oppositepose. Saidblock 10 is mounted upon asuporting arm 12 hinged to the side of theBase B adjacent to the work on a pivot 13. Said arm 12 has a downwardlyprojecting branch 14 extending below pivot 13-against which a rod 15 isadapted to bear. Said rod 15 is mounted in a diagonal perforationextending through base B, its outer end being screw' threaded andextending through a screw threaded sleeve 16, which is mounted in anenlarged outer end of said perforation. Said sleeve 16 is held in normalposition by means of a sliding latch pin 17 mounted in a transverseperforation in base B and having a knob 18 on its outer end. The point.

sleeve 16. A screw 19 is mounted in base B with its point engaging aslot in the side of sleeve 17 to hold it in position and permit alimlted longitudinal movement. A spring 20 bears against a shoulder atthe outer end of said pin 17 and serves to normally hold the pointthereof in engagement with the depresslon or socket in sleeve 16, asbest shown in Fig. 2. By this means it will be readily seen that rod 15can be slid longitudinally 1n the perforation containing it by merelywithdrawing pin 17 7 until its point is disengaged from sleeve 16. Theweight of arm 12 will ordinarily cause the movement or it may becontrolled by hand. As soon as released spring 20 will return latch pin17 to normal position with its point ready to engage socket in sleeve 16as soon as the parts are brought into register. By this means the rest10, which is supported by the point of rod 15, may be quickly movedtoward or from the work, out of the way when work is to be put into themachine and into position for service when the Work is in position andmuch time ordinarily required for adjustment is thus saved. The feedingof the rest against the work as it is ground away is accomplished byturning rod 15 through the medium of the knurled outer end 21, which, bymeans of the screw threaded engagement with the sleeve 16, enables theadjustment to be made to any degree desired. The rest 11 is mounted inthe end of a sliding rod or bar 22 which extends into a socket in theupper portion of the base B with its central line substantially oppositethe center of the work. A screw rod 23 with a knurled outer end 24 ismounted in a screw threaded perforation in said base B, whichperforation extends into the socket containing bar 22. The inner end ofsaid rod 23 is thus adapted to bear against the end of said rod 22 andprovide for the adjustment of said block 11 toward or against the work.A jam nut 25 is mounted on said screw rod 23 for locking the same inadjusted position.

In operation, the parts are mounted and adjusted in position as shown inFig. 1, the work W resting against the block 11 opposite the point ofcontact with the grinding wheel C. Block 10 rests against the undersideof the work with its face at an angle as best shown in Fig. 1 so thatthe support is slightly beyond a vertical line drawn through the centerof the work, thus afl'ording the work a firm support between the two'secure by Letters Patent is:

1. A work rest for grinding machines comprising a base, a work supportconsisting of an angle arm pivoted at its angle to said base at a pointbelow the work with one arm thereof extending upwardly at an angle torest against the under side of the work and its other arm extendingdownwardly from saidpivot, a bearing block detachably secured to theupper angular face of said work supporting arm adapted to rest againsttheunder side of the work at an angle thereto, an adjustable rodextending through the base at an angle adjacent to the lower end of saiddownwardly projecting arm and adapted to bear against said arm, meansfor adjusting and securing said rod in an adjustable position, anotherwork rest mounted in a horizontal perforation opposite the axis of thegrinding Wheel, and means for adjusting said horizontal rest,substantially as set forth.

2. A work-rest for grinding machines comprising a pivoted supportcarrying a part adapted to bear against and support the work, a slidingrod adapted to control the movement of said pivoted support, saidsliding rod being mounted by means of a screw threaded connection in asleeve, and means for locking and releasing said sleeve againstlongitudinal movement, substantially as set forth.

3. A work-rest for grinding machines, comprising a base, a pivotedsupport on said base, a part on said pivoted support adapted to bearagainst and support the work, means for supporting and adjusting saidpivoted support comprising a rod mounted in a perforation in said baseand formed screw threaded with a sleeve mounted on said screw threadedportion, said sleeve mounted in a socket in said perforation in thebase, and means for locking and releasing said sleeve, substantially asset forth.

- In Witness whereof, I have hereunto set my hand and seal atlVaynesboro this th day of March, A. D. nineteen hundred and twelve.

HARRY T. SHEARER. [1 s.] Witnesses:

CHAs. B. CLAYTON, K. H. VVASHABAUGIL

